反应详情

温度

60 °C

A solution of pre-dried 5-(3-hydroxy-1-propynyl)-2′-deoxyuridine (Robins, M. J. et al. (1983)) (565 mg, 2 mmol) in 40 mL of anhydrous THF under argon was treated with 4-nitrophenol (696 mg, 5 mmol), triphenylphosphine (787 mg, 3 mmol), and diisopropyl azodicarboxylate (590 liters, 3 mmol), and the reaction mixture heated at 60° C. until the solution was clear, and then 1 hour longer. The mixture was allowed to cool to 23° C. and then it was evaporated onto SiO2 and purified by chromatography using MeOH/CH2Cl2 as eluent to afford 107 mg (13%) of the desired ether product: melting point 112–118° C. 1H NMR ((CD3)2SO) δ 11.65 (s, exchanges with D2O, 1, NH), 8.29 (s, 1, H6), 8.24 (d, J=9.3 Hz, 2, m-ArH), 7.23 (d, J=9.3 Hz, 2, o-ArH), 6.09 (pseudo-t, 1, H1′), 5.17 (s, 2, propargyl-CH2), 4.22 (m, 1, H3′), 3.80 (m, 1, H4′), 3.59 (m, 2, 5′-CH2), 2.13 (pseudo-t, 2, 2′-CH2). Low-resolution mass spectrum (DCI-NH3) on per-trimethylsilyated material, m/z 547 [M(TMS)2H+], 565 [M(TMS)2NH4+], 620 [M(TMS)3H+].

1. custom1 hour
2. temperatureto cool to 23° C.
3. customit was evaporated onto SiO2
4. custompurified by chromatography
5. customto afford 107 mg (13%) of the desired ether product